Stenciling-machine.



J. SOKOLOV.

STENCILING MACHINE.

APPLICATION FILED SEPT.9,1908.

Patented May 24,1910.

' 8 SHEETS-SHEET 1.

By his J SOKOLOV.

STENGILING MACHINE.

APPLICATION FILED SEPT 9 190a Patented May 24, 1910.

s SHEETS-SHEET 2.

Patented May 24, 1910.

8 SHEETS-SHEET 3.

J. SOKGLOV.

. STENCILINGMAUHINE.

APPLICATION FILED SEPT 9 1908 Witnesses: W idffiu/ 6% J. SOKOLOV.

STENCILING MACHINE.

APPLICATION FILED SEPT.9, 1908.

- 8 SHEETS-SHEET 4.

Patented May 24, 1910.

I} In: fltforrf} J. SOKOLOV.

STENGILING MACHINE.

APPLICATION FILED SEPT. 9. 19084 8 SHEETS-SHEET 5.

Patented May 24, 1910.

J. SOKOLOV.

STENCILING MACHINE.

APPLICATION FILED SEPT. 9, 190a.

Patented May 24,1910.

8 SHEETS-SHEET 6.

Patented May 24, 1910.

8 SHEETS-SHEET '7.-

Wmesses In van iar:

W 3mm W Jay luls Mama I a l I I r J. SOKOLOV.

STENGILING MACHINE.

APPLIOATION FILED SEPT. 9, 1908.

Patented May 24, 1910.

8 SHEETS-SHEET 8.

Mtnesses:

W J LH L. I W (a.

UNITED STATES PATENT OFFICE.

JACOB SOKOLOV, OF NEW YORK, Y., ASSIGNOY. .J UNDERWOOD TYPEWRITERCOMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

STENCILING-MACHINE. 7

Specification of Letters Patent.

Patented May 24, 1910.

county of Kings and State of New York,-

have invented certain new and useful Improvements 1nStenc1l1ng-Mach1nes,of which the following is a specification. f

' This invention relates generally-to feeding devices, particularly tothose for feeding sheets to printing or stenciling machines, and moreespecially to machines in which off-setting of ink from one printedsheet to another is likely to occur.

The invention is illustrated in connection with a stenciling machine.

One of the main objects of the invention is to provide simple andefiicient means for guarding against off-setting of the ink from onestenciled sheet upon the back of another stenciled sheet. To this endthe stencil sheet is interleaved. This is accomplished by feeding sheetsfrom two piles concomitantly, tolalternate with one another in thedelivery pi e.

The pile of sheets to be stenciled is preferably placed on onefeedbo'ard, and the pile of interleaving sheets is placed beneath themon another feedboard, and a duplex mechanism advances a sheet from eachpile,at each revolution of the stencil cylinder.

The duplex sheet-advancing mechanism preferably comprises a roll runningupon each of the two piles of sheets, said rolls being connected to asingle carriage, and the latter connected to the stencil cylinder tocause the carriage and rolls to travel back and forth at everyrevolution of the cylinder.

Mechanism is provided to clamp the rear ends of the sheet piles, afterthe rolls have buckled the rear portions of the sheets and before thesheets'are fed off from the piles; said clamping mechanism being of aduplex character but having a. single pawl-andratchet trip mechanism.

The main sheets are fed between the stencil cylinder and the usualpressure roll; while the-interleaving sheets are fed between anauxiliary pair of rolls, the upper of which runs in contact with saidpressure roll. The interleaving sheets feed for-. wardly below thestencil cylinder and its pressure roll. 1

Other features and advantages will hereinafter appear.

In the accompanying drawings, Figure 1 is a front perspective view ofone form of machine embodying-the present improvements. Fig. 2 is a rearperspective view of the same, embodyin a stencil cylinder showing thefeeding-r0 ls at the completion of their advance stroke. Fig. 3 isanother perspective elevation, showing the feeding rolls at the beginninof their advance stroke. Fig. 4 is a sectional side elevation, showingthe parts in about the same position as Fig. 3. Fig. 5 is a view likeFig. 4, but showin the parts in the Fig. 2 position. Fig. 6 1s a detailof the mechanism for gaging the leading edges of the sheets to be.stenciled, showing the age in inoperative position. Fig. 7 is a Viewsimilar to Fig. 6, but showing the gage in operative position. Fig. 8 isa detail view of a flap mechanism for jogging back the piles 0 sheets toovercome their tendency to creep forward; this mechanism also performingthe function of restraining the piles from advancing while the rearclamps are released to permit the buckling of the top sheets'in the twopiles. Fig. 9 is a View similar to Fig. 8, but showing the flaps asswung out of the way of the advancing sheets. Figs. 10 and llshow meansfor releasing the pressure roll automatically, to permit the sheet topass forward between the pressure roll and't'he stencil cylinder and thegage; and also means to throw off the pressure roll at will to preventit from becoming inked in case of failure of the sheet to feed forwardinto the bight of the pressure roll and cylinder. This throw-off isuseful in some cases when the machine is power-driven; and it is also ofadvanta 'e when itis desired to manipulate" the stencil cylinder tofasten the stencil thereon, at which time the pressure roll should notrun upon the cylinder. Fig. 10 shows the parts in gprmal positions, andFig. 11 shows the pressure roll cast off. Fig. 12 is a detail plan of apawl and ratchet mechanism which releases the pa er pile from theclamps, and the trip which releases the pawl from the ratchet. Fig. 13is a sectional front elevation of the rear portion of the machine,showing articularly the paper clamp mechanism. ig. 14 is a sectionalrear view of the rear ortion of the machine, showing the sheetucklingand feeding rollers and the carriage to which they are attached.

The stencil cylinder 1 is of the usual type t and may be rotated eitherby a handle 2 or by a power shaft 3, by means of a sprocket wheel 4. Apressure roll 5, running upon the bottom of the cylinder, presses thesheets against the same to be stenciled.

At- 6 is seen a pile of sheets to be stenciled, said sheets resting uponatable 7, and advanced one by one to the bight of the cylinder andpressure roll by means of a buckling and feeding roll 8. Said roll 8 isconnected to a carriage or traveler 9, the latter in turn connected by alink .10 to acrank 11 fixed upon the drive shaft 3. The carriage is runback and forth in guide-ways 12, formed in op osite sides 13 of theframework. Said fee ing roll 8 is carried upon a bail comprising a pairof arms 14 and a cross-bar 15, said bail hinged upon a shaft 16, theends of which are guided in opposite horizontal slots 17 in the top ofthe framework 13. Said shaft 16 is connected by a pair of bars 18 to theends of side frames of the carriage 9. The roll 8 of soft rubber is madeof two sections, between which is secured a ratchet wheel 19, with whichcooperates a spring pawl 20, fixed upon the cross bar 15, to preventsaid roll from turning during its advance movement, and to permit it toroll idly upon the pile of sheets during its return movement.

As it is desired to leave one end of the stencil cylinder 1 entirelyopen for theintroduction of an inking implement, it is preferred to usea single crank 11 and link 10 at only one side of the machine, foroperating the carriage. Movement of the latter in parallelism andwithout binding is secured, however, by means of a pair of pinions 21mounted at the ends of the carriage and fixed upon a revoluble shaft 22,and in mesh with a pair of racks 23 extending from front to rear andfixed upon the under side of the table 7 the shaft 22 being mounted inthe ends or heads 9 of the carriage, whose free and accurate movement isthus secured even though it is driven only at one side.

The pile of interleaving sheets 24, preferably of the same dimensions asthose in the pile 6, rests beneath the table 7 upon a table 25, and arebuckled and fedforwardby a roll 26 mounted upon a bail. The latterconsists of arms 27 and a cross-bar 28, and is mounted upon a crossshaft 29, which at its ends is supported'in bars 30 fixed at their rearends to a cross rod 31 of the carriage frame, and also having guideblocks 32 to work in guide slots 33 of the sides 13 of the framing. Therubber roll 26 is also provided with a ratchet wheel 34 and pawl 35. Thetwo rolls 8 and 26 travel together forwardly and backwardly with thecarriage 9 at every revolution of the stencil cylinder.

At the completion of each return stroke of the roller carriage 9,clamping bars 36, 37 are raised from the rear ends of the piles ofsheets, to permit the rolls to buckle the" top sheets on the pile. Theseclamps may conveniently be secured at their ends to a pair of verticalracks 38, working in slides 39 at the rear of the. machine, and meshingwith pinions 40. The latter are fixed upon a horizontal revoluble shaft41, journaled at its ends in hangers 42 on the framework, whereby therack frame is caused to move up and down in parallelism. Upon the pinionshaft 41 is fixed a ratchet wheel 43, and an arm 44, hung loosely uponsaid shaft, carries a pawl 45, which is pressed by a. spring 46 intoengagement with said ratchet wheel. It will now be perceived that at thefinal portion of the return movement of the roller carriage 9 to theFig. 4 position, said carriage. strikes a shoulder 47 formed upon thearm 44, and thereby causes the pawl 45 to turn the ratchet wheel 43 andthe pinion shaft- 41, thereby lifting the racks 38 and the clamping bars36, 37, preparatory to the buckling action of the rolls.

Upon the advance of the carriage from the Fig. 4 position toward theFig. 5 position, the buckling rolls 8 and 26 buckle the top sheets onthe piles, withdrawing their rear ends from beneath the clamps 3t 37. Atthe same time a spring 48 upon the pinion shaft 41 starts to return saidshaft and its connected parts, including the ratchet wheel and the pawl.The latter is immediately tripped from the wheel by a pin 49, thuspermitting the spring 48 to throw the clamps-firmly own upon the sheets,to prevent creeping or advance movement thereof. It will be understoodthat the pawl 45 in rising, as aforesaid, passes freely by the trip pin49, said pawl having a cam-face 50 to engage said pin and push it out ofits path; the pin beingcarried upon a yielding mount 51 for this:purpose. Although a single pawl and ratchet mechanism serves to releaseboth clamps still the invention is not limited to a machine in which theclamps are rigidly connected. As soon as the sheets are buckled, theflaps 52, 53 are turned downwardly from the positions at Figs. 4 and 8to the positions at Figs. 5 and 9, where they are out of the way of theadvancing sheets, the latter passing over said flaps as illustrated atFig. 5.

To control the flaps, there is provided upon the drive shaft 3 acam-collar 54, on which runs a roll 55, pivoted upon the top of a lever56, which is fulcrumed on a pin or stud 57 secured upon the framing.This lever is connected by one link 58 to an arm 59 projecting from arock-shaft 60 which carries the upper flap 52; and by another link 61 toan arm 62 provided upon a rockshaft 63 which wrries the lower flap 53.

The collar 54 has an inclined cam-portion i 64 to turn the lever 56 androck the flaps up ,as. at Fig. 8. Succeeding the cam portion 54 is adwell-portion 65, to hold the flaps up temporarily; and at the momentwhen it is desired to advance the sheets over the flaps,

the latter are drawn back by springs 66, 67,

this movement being quick, owing to the sharp drop 08 at the terminus ofthe dwell 65 of the cam. The parts remain in the Fig. 9 position duringthe remainder of the cycle of operations; the roll 55 running idly uponan edge 69 of the collar formed concentrically with the drive shaft 3.

The sheet from the upper pile is advanced by the roll 8 to pass itsleading edge between the stencil cylinder 1 and the pressure roll 5beneath it. In order to enable the sheet to pass freely between saidcylinder and pressure roll, the latter is automatically re leased for ashort period. vided with an axle '70, Whose ends are journaled upon apair of arms 71, the latter at their rear ends pivoted at 72 upon theframework of the machine, and at their forward ends connected by atransverse horizontal bar 73. By means of the latter, the arms 71 andthe pressure roll 5 are first caused to drop and'then to rise and pressthe sheet against the stencil cylinder. This effect is produced by a cam74, engaging the bar 73 about midway the length of the latter, and fixedupon a rock-shaft 75. The rocking of this shaft, and consequently the upand down movements of the pressure-roll 5, are etfected by a cam collar76 on the main drive shaft 3. A roll 77 running upon the edge of saidcollar is pivoted upon the top of a lever 7 8. The latter is pivotedupon the pin or stud 57, and at its lower end has a slot '79 to engage apin 80 on a horizontal sliding bent bar or link 81. The latter has a pin82 to engagea slotted arm 83 fixed on the rock-shaft 75; and as thislink 81 rides backwardly and forwardly, it rocks shaft 75 and drops andraises the pressure roll 5. The link or bar 81 may;have at its rear enda slot 84 to ride upon the shaft 75 and at its forward end a slot 85 toride upon a bearing or shaft 86. During'fthe principal portion of therevolution of the stencil cylinder 1, the roll 77 runs idly upon thecollar 76; and'at the proper time it runs into an abrupt depression 87in said collar, permitting a spring 88 to'turn said lever 78, to'draw,forwardly link 81 and turn backwardly the cam 74, to

allow the pressure roll 5 to drop from the stencil cylinder.

7 While the sheet is being introduced-between the pressure roll and thestencil cylinder, the roll 77 is running upon an idle portion '89 of thecam collar 76; and at the end thereof a cam-portion 90 engages the roll77 and forces'the parts to resume nor- Said roll is pro-' turned 11interleaving sheet against; the roll 9 mal positions, the pressure roll5 bearing against the under side of the stencil cylinder. The pressureroll may be cast off at will by means of a treadle 91, Figs. 10 and 11,

which is connected by a hook 92 to a sliding bolt 93 mounted upon thelower arm 94 of the lever-78. The upper end of said bolt is pointed, asat 95', to fit 'into a notch in the bottom part of the lever 78. Thepart 94 is pivoted to turn independently of the lever 78, and when thepoint 95 is pulled down outof the notch, the spring 88 serves to swingthe arm 94 forwardly to the Fig. 11 position, thereby carrying the linkor bar 81 forwardly and turning the cam 74 to'cast otf the pressure roll5. This cast off is of advantage when the machine is power driven, as byrunning a chain from a driving sprocket to a sprocket 4 carried upon thedrive shaft 3. In case a sheet fails to enter between the pressure rolland the stencil cylinder, the pressure roll may be cast off instantly bydepressing the treadle before the stencil cylinder comes to rest, so asto upon the surface of the pressure roll 5,

.which would be an objection. The cast-off ,mechamsm 1s also anadvantage-when a stencil cylinder is being manipulated to secure thestencil sheet thereto. Also hung upon the pressure roll arm 71, andrunning in contact with the pressure roll itself, to be revolvedthereby, is a roll 97, for advancing the interleaving sheets from thebottom pile 24. These interleaving sheets are buckled and advanced fromthe lower pile in the same manner as the sheets from the upper pile, andthe former are run up an inclined feedboard 98 and ass between said roll97 and a'bottom roll or rolls 99, the latter mounted upon the under sideof the feed-- board and projecting up therethrough to bear against theunder side of the roll 97 g The feed-board 98 is swiveled at its rearend upon a horizontal shaftlOO mounted in the framework, and at itsforward portion is extended "past the roll or rolls 99, to rest upon apair of cams 101 fixed upon the rock shaft 8 6. Also fixed upon saidrock shaft is a slotted arm 102, engaged by a pin 103 on the bent linkor bar 81; so that when the main pressure roll 5 is dropped, the cam orcams 101 also turn forwardly and downwardly to drop the feed-board 98together with the roll 99 mounted thereon; the desired movement of thelatter being in excess of that of the roll 97, so that a space is formedbetween 97 and 99 to admit the' leading edge of the interleaving sheetas the latter 'is advanced by the traveling feed roll I 26. When the cam90 force sthe lever 78 while the upper sheet is being stenciled upon,the lower sheet is being advanced past the stencil cylinder, to bedeposited upon the last stenciled sheet, while the sheet now beingstenciled upon will be deposited upon said interleaving sheet.

Upon the top sheet being advanced between the released pressure roll andthe stencil cylinder 1, and just before the roll rises to bite thesheet, the latter is arrested by a gage bar 10-1, which is mounted upona pair of arms 105 rising from a rock-shaft 106. By this means the sheetis registered, so that the stenciled matter may always fall upon thesuccessive sheets at the same distance from the top. Said rock-shaft 106carries an arm 107, which is connected by a link 108 to a link 109pivoted upon the stud 57, and having a roll 110 to run upon a cam collar111 fixed upon the drive shaft 3. Normally said roll 110 runs idly upona portion 112 of said collar which is concentric to the drive-shaft 31;the gage 10-1 being at this time swung forwardly and downwardly out ofthe way as at Fig. (5; but at the proper moment a cam 113 on said collar111 turns the lever 109 to swing the gage up to the Fig. 7 position, togage the sheet, as already explained. As soon as this is done, the roll110 runs into a depression 114 formed on said cam collar, and the spring115 restores the parts to normal Fig. 6 position. i

In operation the roll 8 is lifted about the hinge 16 and the upper pileof sheets 6, to be stenciled upon, is laid upon the table 7 with itsback edge against a rear gage 116; a hand wheel 117 being first rotatedto lift the clamping bar frame to permit insertion of the piles ofsheets beneath the clamping bars; said hand wheel 117 being fixed uponthe pinion shaft 41. Then a rear gage 118 at the bottom of the machineis turned up about a hinge 119 to permit the pile of sheets 24 to beintroduced; the roll 26 being held -up while the sheets are going in.The gage 118 is then turned down and secured firmly by a thumb nut orscrew 120 or other means. The rolls 8 and 26 are then dropped upon thesheets, and the machine ifs started in operation. The carriage. 9 isdrawn forwardly from the Fig. 4 position to'the Fig. 5 position; andduring the first part of such movement the rolls 8 and 26 buckle the topsheets' of the piles. After the rear edges of the top sheets have beenWithdrawn from the clamps 36, 37",.the trip pin 49, Fig. 12, causes thepawl 35 to release the ratchet Wheel 43, so that the spring48 causes theclamps to fall upon the remaining sheets in the two piles *to preventthem from creeping forwardly.

During the further advance of the carriage, the flaps 52 and 58 arethrown down from the Fig. 4 to the Fig. 5 position, and the buckledsheets advanced thereover, the top one passing between the stencilcylinder 1 and the pressure roll 5, and the bottom one between the upperand lower feeding rolls 97 and 99. The top sheet is gaged by means ofthe gage 104, Fig. 5, and the gage drops back to the Fig. 4 position.

To facilitate introduction of the sheet, the roll 5 is thrown off to theFig. 5 position, and simultaneousl the roll 99 separated from the roll97; but after the sheets have entered the bights of the rolls the latterare restored to normal positions, and the sheets fed forwardly as at 121and 122, the former becoming stenciled in the usual manner. The sheetsthen fall onto a delivery table 123 forming a pile 124. It will be seenthat the interleaving sheet 122 drops upon the previously stenciledsheet, while the sheet now stenciled drops upon said interleaving sheet.

\Vhile the sheets are advancing from the Fig. 5 position and beingdelivered, the carriage 9 with its rolls 8 and 20 runs backwardly toinitial position, and during the last part of its movement, the carriagestrikesthe shoulder 47 on the arm 44 that releases the clampingmechanism, and both clamps are lifted from the piles.

Variations may be resorted to within the scope of the invention, andortions of the improvements may be used without others.

Having thus described my invention, I claim:

1. A sheet-feeding mechanism comprising a framework, a reciprocatingcarriage guided upon the framework, a pair of racks fixed upon theframework at the ends of the carriage, a pair of pinions meshing withsaid racks, a shaft upon which said pinions are fixed, said shaftjournaled upon said carria e, and .upper and lower sheet-feeding rol sattached to said carriage to run respectively upon upper and lower pilesof sheets.

2. A sheet-feeding mechanism comprisin a framework, a reciprocatingcarriage guide upon the framework, a pair of racks fixed upon theframework at the ends of the carriage, a pairof pinions meshing withsaid racks, a shaft upon which said pinions are fixed, said shaftjournaled upon said carriage, upper and lower sheet-feeding rollsattached to said carriage to run respectively upon upper and lower pilesof sheets, a power-driven shaft having a crank, and a link connectingsaid crank to said carriage.

3. A sheet-feeding mechanism comprising a framework, a' reciprocatingcarriage guided upon the framework, a pair of racks fixed upon theframework at the ends of the carriage, a pair of pinions meshing withsaid racks, a shaft upon which said pinions are fixed, said shaftjournaled upon said carriage, upper and lower sheet-feeding rollsvattached to said carriage to run respectively upon upper and lowerpiles of sheets, and

means connected only to one end of the carriage for drivin the same.

4.' In a-sheeteeding mechanism, the combination with a sheet-feedingroller carriage, of an actuator in the path of a part of said carriageto be engaged thereby at the final. portion of the feeding movement ofthe carriage, a pawl driven by said actuator, a ratchet operatedv by.said' pawl, paper-pile clamps lifted by the ratchet from upper andlower piles of sheets, and means for tripping the pawl from the ratchetduring the return stroke of said actuator at the 'initial portion of theadvance movement of said carriage.

5.'A stenciling or printing machine having a stencil cylinder and meanscooperating therewith to deliver the sheets as they are stenciled orprinted upon, and an interleaving sheet-feeding mechanism upon theintroductory side of the machine and includ ing a table to receive thepile, a pair of feeding rolls, and means to advance the sheets to' sa1drolls, the interleavin mechanism being constructed, arranged an timed tocarry the sheets past the stencil cylinder to the deliv- Very sidethereof to alternate with the sheets delivered by the stenciling orprinting machine.

6. A stenciling-or printing machine includin an impression cylinder andaroll to press tie sheets against the cylinder, and an interleavingsheetfeeding mechanism including a pair of rolls one of which runs incontact with said pressure roll, and meansconnected to said impressioncylinder to feed the sheets to said pair of rolls to be interleavedthereby with the sheets delivered by the stenciling machine. 1

7. A stenciling or printing 'machine having an impression cylinder and afeed board for the sheets to be stenciled upon, in combination with aseparate feed-board beneath the first for interleaving sheets, mechanismconnected to the stencilin machine for .buckling and advancing t einterleaving sheets, and means to convey them past said impressioncylinder to the delivery side of the stenciling machine, to interleavethe sheets which are stenciled upon, said con veying means including apair of rolls to which the sheets are delivered by the buckling andadvancing mechanism. 1

8. A stenciling or printing machine having an impression cylinder and afeed board for the sheets to be stenciled upon, in combination with aseparate feed-board for interleavin sheets, mechanism connected to thestenciling machine for buckling and advancing the. interleaving sheets,and means to convey them to the delivery side of the stenciling machine,to interleave the sheets which are stenciled upon, said conveying meansincluding a air of rolls to which the sheets, are delivere by thebuckling and admked impressions on the paper.

vancing mechanism, and said pair of rolls being arranged below saidimpression cylinder, to advance the interleaving sheets past saidcylinder to the delivery side thereof.

9. A stenciling or printing machine having an impression cylinder and afeed board for the sheets to be stenciled upon, in combination with aseparate feed-board for interleavingfsheets, mechanism connected to thestenciling machine for buckling and advancing the interleaving sheets,and means to convey them to the delivery side of the stenciling machine,to interleave the sheets which are stenciled upon, said conveying meansincluding a pair of rolls to which the sheets are delivered by thebuckling and advancing mechanism, and one roll of'said pair running incontact with a roll which is pressed against said cylinder to make the I10. A stenciling or printing machine or the like provided with astenciling or printin couple and having at the introductory si e of themachine. means to support a pile of sheets to be stenciled upon, amechanism for mechanically feeding said sheets, a second support alsoupon the introductory side of the, machine for a pile of interleavingsheets, and a pair of rolls or feeders operatively connected to thestencil cylinder 'to carry the interleaving sheets past the stencilingor printing cou le to the delivery side of the stencil cylin er, tointerleave the sheets stenciled upon. I

11. A stenciling or printing machine comprising a stenciling or'printing couple and aving means to mechanically feed sheets thereto andto deliver sheets as they are stenciled or printed uponQin fombinationwith a second sheet-feeding mechanism con- 05 nected to said machine andincludiiiga table on the introductory side of the machine to receive apile of interleaving sheets, apair of feeding rolls, andmeans't'oadvanc'e the interleaving sheets past said printing couple tosaid rolls concomitantly with the advance of the sheets to be stenciled.

12. A stenciling or printingmachine in cluding an impression cylinderanda roll to press the sheets against the cylinder, a mechanism into feedsheets from *pile to v said cylinder and roll, and an interleavingsheeteeding mechanism including a pair of rolls, one of which runs incontact with said pressure roll, and means connected to said impressioncylinder -to feed the interleaving sheets to said pair of rollsconcomitantly with the sheets fed to said impression cylinder. 1

13. In a stenciling; or printing machine having two feed boards, onebeneath the .other, one for sheets to be stenciled upon,

and the other for interleaving sheets, .and two sheet-feeding mechanismshaving a common carriage or driver which is operat1vely130 connected tosaid machine, and each including means for buckling and advancing thesheets.

14. A stenciling or printing machine having an impression cylinder and afeed-board for the sheets to be stenciled upon, in combination with aseparate feed board for interleaving sheets, mechanisms operativelyconnected to the stenciling machine for con comitantly buckling andadvancing sheets from both piles, and to convey the sheet from one pileto the stenciling cylinder and the sheet from the other pile from theintroductory side past the stenciling cylinder to the delivery side ofthe stenciling machine to interleave the stenciled sheets.

15. A stenciling or printing machine having an impression cylinder and afeed-board for the sheets to be stenciled upon, in combination with aseparate feed board for interleaving sheets, mechanisms operativelyconnected to the stenciling machine for concomitantly buckling andadvancing sheets from both piles, and to convey the sheet from one pileto the stenciling machine and the sheet from the other pile from theintroductory side past said impression cylinder to the delivery side ofthe stenciling machine to interleave the stenciled sheets, theinterleaving sheet-feeding mechanism including a pair of rolls to whichthe sheets are delivered by its buckling and advancing mechanism.

16. A stenciling or printing machine having an impression cylinder and afeed-board for the sheets to be stenciled upon, in combination with aseparate feed board for interle..ving sheets, mechanisms operativelyconnected to the stenciling machine for concomitantly buckling andadvancing sheets from both piles, and to convey the sheet from one pileto the stenciling machine and the sheet from the other pile to thedelivery side of the stenciling machine to interleave the stenciledsheets, the interleaving sheet-feeding mechanism including a pair ofrolls to which the sheets are delivered by its buckling and advancingmechanism, and said pair of rolls being arranged below said impressioncylinder, to advance the interleaving sheets pastsaid cylinder to thedelivery side thereof.

17. A stenciling or printing machine having an impression cylinder and afeed-board for the sheets to be stenciled upon, in combination with aseparate feed board for in-- terleaving sheets, mechanisms operativelyconnected to the stenciling machine for concomitantly buckling andadvancing sheets from both piles, and to convey the sheet from one pileto the stenciling machine and the sheet from the other pile to thedelivery side of the stenciling machine to interleave the stenciledsheets, the interleaving sheet-feeding mechanism including a pair ofrolls to which the sheets are delivered by its buckling and advancingmechanism, one roll of said pair running in contact with a roll which ispressed against said cylinder to make the inked impressions on thepaper.

18. A stenciling or like machine having a drive-shaft, in combinationwith supports for two separate superposed piles of sheets, and duplexsheet-feedingmechanism upon the introductory side of the machine andincluding a pair of buckling and advancing rolls, one for each pile, anda device operated by said drive shaft and common to said rolls tooperate the same concomitantly.

19. In a stenciling or like machine, the combination of a drive-shaft, asingle carriage connected to said drive-shaft, and

buckling and advancing rolls all connected to said carriage to feedsheets from separate superposed piles simultaneously.

20. In a stenciling or like machine, the combination of a drive-shaft, acarriage connected to said drive-shaft, buckling and advancing rollsconnected to said carriage to feed sheets from separate pilessimultaneously, one of said rolls to feed sheets to the stencilingmachine and the other to feed interleaving sheets past the stencilingmachine to the delivery side thereof.

21. In a stenciling machine, the combination with a stencil cylinderhaving a driveshaft, of a carriage, a link connecting said carriage to acrank on the driveshaft, and a pair of buckling rolls connected to saidcarriage, one to feed sheets to be stenciled upon and the other to feedinterleaving sheets.

22. In a stenciling machine, the combination with a stencil cylinderhaving a driveshaft, of a carriage, a link connecting said carriage to acrank on the drive-shaft, and a pair 'of buckling rolls connected tosaid carriage, one to feed sheets to be stenciled upon and the other tofeed interleaving sheets, an upper shelf or table being provided to holdthe sheets to be stenciled upon, and a lower shelf or table for theinterleaving sheets.

23. In a stenciling machine, the combination with a stencil cylinderhaving a driveshaft, of a carriage, a link connecting said carriage to acrank on the drive-shaft, a pair of buckling rolls connected to saidcarriage, one to feed sheets to be stenciled upon and the other to feedinterleaving sheets, an upper shelf or table being provided to hold thesheets to be stenciled upon, and a lower shelf or table for theinterleaving sheets, and guides for said carriage being providedadjacent to said tables at the sides thereof.

24. In a stenciling machine, the combination with a stencil cylinderhaving a driveshaft, of a carriage, a link connecting said carria e to acrank on the drive-shaft, and a pair 0 buckling rolls, one to feedsheets to bails which are hinged to said carriage.

In a stenciling machine, the combination with a stencil cylinder havinga driveshaft, of a carriage, a link connecting said carriage to a crankon the drive-shaft, a pair of buckling'rolls connected to said carriage,one to feed sheets to be stenciled upon and the other to feedinterleaving sheets, an upper shelf or table being providedto hold thesheets to be stenciled upon, and a lower shelf or table for theinterleaving sheets, and flaps operated by said drive-shaft for pressingand holding back the front edges of the sheets inthe upper and loweriles.

26. In a stenciling machine, the com ination with a stencil cylinderhaving a drive shaft, of a carriage, a link connectingsaid carriage toacrank on the drive-shaft, a pair of buckling rolls connected to saidcarriage, one to feed sheets to be stenciled upon, and the other to feedinterleaving sheets,'an upper shelf or table being provided to hold thesheets to be stenciled upon, and a lower shelf or table for theinterleaving sheets, flaps operated by said drive-shaft for pressing andholding back the front edges of the sheets in the upper and lower piles,and a clamping mechanism for the rear portions of said upper and lowerpiles.

27. In a stenciling machine, the combination with a stencil cylinderhaving a driveshaft, of a carriage, a link connecting said carriage to acrank on the drive-shaft, a pair of buckling rolls connected to saidcarriage, one to feed sheets to be stenciled upon and the other to feedinterleaving sheets, an upper shelf or table being provided to hold thesheets to be stenciled upon, and a lower shelf or table for theinterleaving sheets, flaps operated by said drive-shaft for pressing.and holding back the front edges of the sheets in the upper and lowerpiles, a clamping mechanism for the rear portions of said upper andlower piles, said clamping niechani m including a pair of racks, upperand lowemclamps connected to said racks, pinions fixed imwrcreyolubleshaft and meshing with said I" 1CkS, L 1'iIlICl1et wheel also fixed uponsaid shaft, av pawl operated by said drive shaft for turning saidratchet wheel to lift the clamps, andra trip for the pawl, and means forpressing the clamps down upon the sheets when the pawl is released.

28. In a stenciling machine, the combination with a stencil cylinderhaving a driveshaft, of a carriage, a link connecting said carriage to acrank on the drive-shaft, a pair of buckling rolls connected to saidcarriage, one to feed sheets to be stenciled upon and the other to feedinterleaving sheets, and flaps operated by said drive-shaft for pressingand holding back the front edges of the sheets in the upper and lowerpiles.

29. In a stenciling machine, the combination with a stencil cylinderhaving a driveshaft, of a carriage, a link connecting said carriage to acrank on the drive-sl'iaft, a pair of buckling rolls connected to saidcarriage, one to feed sheets to be stenciled upon and the other to feedinterleaving sheets, flaps operated by said drive-shaft for pressing andholding back the front edges of the sheets in the upper and lower'piles.and a of said upper and lower piles.

30. In a stenciling machine, the combination with a stencil cylinderhaving a driveshaft, of a carriage, a link connecting said carriage to acrank on the drive-shaft, a pair of buckling rolls connected to saidcarriage, one to feed sheets to be stenciled upon and the other to feed'interleaving sheets,

ing and holding back the front edges of the sheets in the upper andlower piles, a clamping mechanism for the rear portions of said upperand lower piles, said clamping mechanism including a pair of racks,upper and lower clamps connected to said racks, pinions fixed upon arevoluble shaft and meshing with said racks. a ratchet Wheel also fixedupon said shaft, a pawl operated by said drive shaft for turning saidratchetwheel to lift the clamps, and a trip for the pawl.

31. In a stenciling machine, the combination with a stencil vlinderhaving a driveshaft, of a carriage, a link connecting said to a crank onthe drive shaft. an n r buckling roll connected to said carriagc, tofeed sheets lower buckling roll also connected to said carriage to feedinterleaving sheets. an .up per shelf or table being provided to holdthe sheets to be stencilcd upon, and a lower shelf or table for theinterleaving sheets, and a clamping mechanism for the rear portions ofsaid upper and lower piles.

32. In a stenciling machine, the combination With a stencil cylinderhaving a drive shaft, of a carriage, a link connecting said cariiagto-a"crank on the drive shaft, an upper buckling roll connected to saidcarriage, to feed sheets to be stenciled upon,

a loyver buckling roll also connected to said carriageto feedinterleaving sheets, an upper shelf or=\t able being provided to holdthe sheets to be stenc i led 'upon, and a lower shelf or table for theinterleaving sheets, a clamping mechanism for the rear portions of saidupper and lower piles, said clamping mechanism including a pair ofracks, upper and lower clamps connected to said racks,

meshing with said racks, a ratchet Wheel clamping mechanism for the rearportions' flaps operated by said drive-shaft for press-.

to be stenciled upon. a:

pinions fixed upon a revoluble shaft and.

also fixed upon said shaft, a pawl operated by said drive-shaft forturning said ratchet wheel to lift the clamps, and a trip for the pawl.

33. The combination with an impression cylinder, of upper and lowersheet-feeding tables for se arate piles of sheets, a common driver, dupex sheet-feedingdevices connected thereto for taking sheetssimultaneously from the piles and advancing them concomitantl to thedelivery side of the machine, and gages for the rear ends of the pilesof sheets.

34, The combination with an impression cylinder, of upper and lowersheet-feeding tables for separate piles of sheets, duplex sheet-feedingdevices, and gages for the rear ends of the piles of sheets, the lowergage movable to permit insertion of the pile.

35. The combination with an impression cylinder, of upper and lowersheet-feeding tables for separate piles of sheets, duplex sheet-feedingdevices, and gages for the rear ends of the piles of sheets, saidsheetfeeding devices including duplex sheetbuckling rolls and duplexclamping mechanism for the rear ends of the upper and lower piles ofsheets.

36. The combination with an impression cylinder, of upper and lowersheet-feeding tables for separate piles of sheets, duplex sheet-feedingdevices, and gages for the rear ends of the piles of sheets, saidsheet-feeding devices including duplex sheet-buckling rolls and clampingmechanism for the rear ends of the upper and lower piles of sheets, saidclamping mechanism including upper and lower clamps and a pawl andratchet wheel mechanism to release both piles.

37. The combination with an impression cylinder. of upper and lowersheet-feeding tables for separate piles of sheets, duplex sheet-feedingdevices, and gages for the rear ends of the piles of sheets, saidsheet-feeding devices including duplex sheet-buckling rolls and clampingmechanism for the rear ends of the upper and loweFpiles of sheets, saidelaniping mechanism including upper and lower clamps and a pawl andratchet wheel mechanism to release both piles, and a finger-piececonnected to said ratchet wheel, whereby'both clamps can be raised topermit insertion of the piles of sheets.

38. The combination with an impression cylinder, of upper and lowersheet-feeding tables for separate piles of sheets, duplex sheet-feedingdevices, and gages for the rear ends of the piles of sheets, saidsheet-feeding devices including duplex sheet-buckling rolls and clampingmechanism for the rear ends of the upper and lower piles of sheets, saidclamping mechanism including upper and lower clamps and a pawl andratchet wheel' mechanism to release both piles, means being provided tocause said pawl to turn said ratchet and lift the clamps to permit thebuckling of the sheets, and means to trip the pawl, to cause theremaining sheets inthe piles to be clamped. I

39. The combination with an impression cylinder, of upper and lowersheet-feeding tables for separate piles of sheets, duplex sheet-feedingdevices, and gages for the rear ends of the piles of sheets, saidsheet-feeding devices including duplex sheet-buckling rolls and clampingmechanism for the rear ends of the upper and lower piles of sheets, saidclamping mechanism including upper and lower clamps and a pawl andratchet wheel mechanism to release both piles, means being provided tocause said pawl to turn said ratchet and lift the clamps to ermit thebuckling of the sheets, means to trip the pawl to cause the remainingsheetsin the piles to be clamped, and a finger-piece connected to saidratchet wheel, whereby both clamps can be raised to permit insertion ofthe pile of sheets.

40. The combination with an impression cylinder, of upper and lowersheet-feeding tables for separate piles of sheets, duplex sheet-feedingdevices, and gages for the rear ends of the piles of sheets, saidsheet-feeding devices including duplex sheetbuckling rolls and clampingmechanism for the rear ends of the upper and lower piles of sheets, saidclamping mechanism including upper and lower clamps and a pawl andratchet wheel mechanism to release both piles, means being provided tocause said pawl to turn said ratchet and lift the clamps to permit thebuckling of the sheets, means to trip the pawl to cause the remainingsheets in the piles to be clamped, said clamps connected at their endsby means of a pair of vertical racks, pinions meshing with said racks,and a shaft carrying said pinions and said ratchet wheel.

41. The combination with an impression cylinder, of upper and lowersheet-feeding tables for separate piles of sheets, duplex sheet-feedingdevices, and gages for the rear ends of the piles of sheets, the lowergage movable to permit insertion of the pile, means being provided tolock the lower rear gage in operative position.

42. The combination with an impression cylinder and sheet-feedingdevices for upper" wheel to release both clamps, a pawl for said 44.,Thecombination with an impression cylinder and sheet-feeding devices forupper and lower piles of sheets, of clamps for the rear ends of thepiles of sheets, a. ratchet wheel to release both clamps, a pawl forsaid ratchet wheel, said clamps connected at their ends by means of apair of vertical racks, pinions meshing with said racks, and a shaftcarrying said plnions and said ratchet wheel.

45. The combination with an impression cylinder and a drive-shaft, ofmeans for holding separate piles of sheets, means for advancing thesheets from the piles, movable flaps to press or hold back the front ofthe piles, gages for the rear ends of the piles, a cam on saiddrive-shaft, and connections between said cam and said flaps.

46. The combination with an impression cylinder and a drive-shaft, ofmeans for holding separate piles of sheets, means for advancing thesheets from the piles, movable flaps to press or hold back the front ofthe piles, gages for the rear ends of the piles, a cam on saiddrive-shaft, connections between said cam and said flaps, saidconnections including a lever to ride upon the cam, links extending fromsaid lever, and rock-shafts carrying said flaps and having arms to whichsaid links are attached.

47. The combination with an impression cylinder and a drive-shaft, ofmeans for holding separate piles of sheets, means for advancing thesheets from the piles, movable flaps to press or hold back the front ofthe piles, gages for the rear ends of the piles, a cam on saiddrive-shaft, connections between said cam and said flaps, saidconnections ineluding a lever to ride upon the cam, links extending fromsaid lever, rock-shafts carrying said flaps and having arms to whichsaid links are attached, and a spring or springs to swing said flapsaway from the piles of sheets.

48. The combination with an impression cylinder, and a drive shaft, of aduplex sheet-feeding mechanism connected thereto, including movableflaps one for each p1le of sheets to be fed, to press or hold back thefronts of the piles, and means connected to said drive-shaft to operatesaid flaps.

49. The combination with an impression cylinder and a drive-shaft, of aduplex sheet-feeding mechanism including flaps to press or hold back thefronts of the piles of sheets to be fed, said flaps mounted on rockshafts, a cam connected to said drive shaft, a lever to ride upon saidcam, and links extending from said lever to arms upon said rock shaftsto rock the latter.

50. The combination with a stenciling machine including a stencilcylinder and a pres sure roll to press the sheets against the cylinder,of an interleaving sheet-feeding mechanism operatively connected to thestencil cylinder andincluding a pair of feeding rolls and means torelease one roll of said pair fronrtheother, to receive the leading edgeof the interleaving sheet, and then to cause the rolls to bite andadvance the interleaving sheets.

51. The combination with a stenciling machineincluding a stencilcylinder and a pressure roll to press the sheets against the cylinder,of an interleaving sheetfeeding mechanism operatively connected to thestencil cylinder and including a pair of feeding rolls and means torelease one roll of said pair from the other, to receive the leadingedge of the interleaving sheet, and then to cause the rolls to bite andadvance the interleaving sheets, one of the rolls of said pair runningin contact with said pressure roll.

52. The combinationwith a stenciling machine including a stencilcylinder and a pres sure roll to press the sheets against the cylinder,of an interleaving sheet-feeding mechanism operatively connected to thestencil cylinder and including a pair of feeding rolls and means torelease one roll of said pair from the other, to receive the leadingedge of the interleaving sheet, and then to cause the rolls to bite andadvance the interleaving sheets, the movable roll in said pair of rollsbeing mounted upon a feeding table and the latter having means formoving it away from the other of said pair of feeding rolls.

53. The combination with a stenciling machine including a stencilcylinder and a pressure roll to press the'sheets against the cylinder,of an interleaving sheet-feeding mechanisnr operatively connected to'thestencil cylinder and including a pair of feeding rolls and means torelease one roll of said pair from the other, to receive the leadingedge of the interleaving sheet, and then to cause the rolls to bite andadvance the interleaving sheets, the movable roll in said pair of rollsbeing mounted upon a feeding table and the latter having means formovingit away from the other of said pair of feeding rolls, saidfeed-board moving means including a cam connected to said stencilcylinder, and a lever operated by said cam.

54. The combination with a stenciling machine including a stencilcylinder and a pressure roll to press the sheets against the cylinder,of an interleaving sheet-feeding mech-.

edge of the interleaving sheet, and then to cause the rolls to bite andadvance the interleaving sheets, the movable roll in said pair of rollsbeing mounted upon a feeding table and the latter having means formoving it away from the other of said pair of feeding rolls, saidfeed-board moving means includmg a cam connected to said stencilcylinder, and a lever operated by said cam, the connection between saidlever and said feed-board including a rock-shaft operated by said lever,and a cam or cams upon said rockshaft to lift and drop said feed-board.,

55. The combination with a stenciling machine including a stencilcylinder and a roll to press the sheets against the cylinder, of aninterleaving sheet-feeding mechanism operatively connected to thestencil cylinder and including a pair of feeding rolls, one roll in saidpair of feeding rolls being mounted upon a movable support, and meansfor moving said roll away from and back to the other of said pair ofrolls.

56. The combination with a stenciling machine including a stencilcylinder and a roll to press the sheets against the cylinder, of aninterleaving sheet-feeding mechanism operatively connected to thestencil cylinder and including a pair of feeding rolls, one roll in saidpair of feeding rolls being mounted upon a movable su port, and meansfor moving said roll away fi'omand back to the other of said pair ofrolls, one of the rolls of said pair running in contact with saidpressure roll.

57. The combination with a stencil cylinder, of a pressure roll to runthereon, and duplex sheet-feeding mechanism including means to advancesheets between said stencil cylinder and said roll and also including apair of feeding rolls, means for advancing sheets from another pilebetween the rolls of saidpair, and means for releasing said pressureroll from said cylinder and concomitantly separating the rolls of saidpair to permit the introduction of the leadlng edges of sheets, and thenrestoring the rolls to normal condition.

58. The combination with a stencil cylinder, of a pressure roll, a pairof arms on which it is mounted, means to move said arms to drop saidroll, and an interleaving sheet-feeding mechanism including a pair ofrolls, one of which is also mounted on said arms to run in contact withsaid pressure roll, means for concomitantly moving the other roll ofsaid pair away from the first roll, and means for restoring the rolls tonormal ositions.

5?. T' e combination with a stencil cylinder, of a pressure roll, a pairof arms on which it is mounted, means to cause said arms to drop andraise said roll, means to feed sheets between said roll and cylinder,and an interleaving sheet feeding mechanism including a pair of rolls,one of which is also mounted on said arms to run in contact with saidpressure roll, and the other of which is mounted upon a movable feedingtable, means being connected to said cylinder for moving said feedingtable with its roll away from the other of said pair of feeding rolls.

60. The combination with a stencil cylinder, of a pressure roll, a pairof arms on which it is mounted, means to cause said arms to drop andraise said roll, means to feed sheets between said roll and cylinder,and an interleaving sheet feeding mechanism including a pair of rolls,one of which is also mounted on said arms to run in contact with saidpressure roll, and the other of which is mounted upon a movable feedingtable, a cam connected to the stencil cylinder, a lever operated by saidcam, a link or bar operated by said lever, and two rock shafts operatedby said link or bar, one of said rock shafts having a cam to throw ofiand on said pressure roll, and the other of said rock shafts having acam to move up and down said feeding table with the feeding rollthereon.

61. The combination with a stencil cylinder, of a pressure roll, a pairof arms on which it is mounted, means to cause said arms to drop andraise said roll,-means to feed sheets between said roll and cylinder,and an interleaving sheet-feeding mechanism including a pair of rolls,one of which is also mounted on said arms to run in contact with saidpressure roll, and the other of which is mounted upon a movable feedingtable, a cam connected to the stencil cylinder, a lever operated by saidcam, a link or bar operated by said lever, and two rock shafts operatedby said link or bar, one of said rock shafts having a cam to throw offand on said pressure roll, and the other of said rock shafts having acam to move up and down said feeding table with the feeding rollthereon, said lever formed in two parts, and

means to disconnect one part from the other to throw off said pressureroll.

62. The combination with a stencil cylinder, of a pressureroll, a pairof arms on which it is mounted means to cause said arms to drop andraise said roll, means to feed sheets between said roll and cylinder,and an interleavin sheetrfeeding mechanism including a pair of rolls,one of which is also mounted on said arms to run in contact with saidpressure roll, and the other of which is mounted upon a movable feedingtable, a cam connected to the stencil cylinder, a lever operated by saidcam, a link or bar operated by said lever, and two rockshafts o eratedby said link or bar, one of said roc shafts having a cam to throw offand on said pressure roll, and the other of said rock shafts having acam to move up and down said feeding table with the-feeding rollthereon, said lever formed in two parts, and means to disconnect onepart roni the other to throw off said pressureroll, said disconnectingmeans including a treadle and a link connecting it to a bolt slidableupon one of the lever parts to engage and disengage the other thereof, aspring being rovided to cast off the pressure roll at such isengagement.

63. The combination with a stencil cylinder, a main drive shaft, apressure roll and a sheet-feeding mechanism, of means for releasing thepressure roll once in each revolution of the cylinder, and agage-mechanism on the delivery side of the pressure roll, includin atransverse gage-bar, a rock-shaft on which it is mounted, a linkconnected-to an arm on said rock-shaft, and a lever connected to saidarm and running upon a cam provided upon the main drive shaft.

64. A. duplex sheet-feedin mechanism comprising upper and lower eedboards to receive the piles of sheets, upper and lower advancing rollsfor said piles, said rolls mounted to be lifted to permit the placing offresh sheets on the boards, and gagesor stops for the rear ends of thepiles, the gage for the lower pile being movable to form an openin forthe insertion of the sheets. 65. A uplex sheet-feedin mechanismcomprising upperand lower eed boards to receive the piles of sheets,upper and lower advancing rolls for said piles, said rolls mounted to belifted to permit the placing of fresh sheets on the boards, and gages orstops for the rear ends of the piles, the gage for the lower pile beingmovable to form an opening for the insertion of the sheets, and

means to secure said lower gage in normal positlon.

66. In a stenciling or like machine, the

are fed therefrom;

JACOB SOKOLOV. Witnesses:

J 011K 0, SEIFERT, K. FRANKFORT.

